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London Heathrow Airport (LHR) departure delays

Name: London Heathrow Airport (LHR) departure delays
Creator: FlightLabs

Of 41,172 sampled departures, 86.1% left 15 minutes or more behind schedule. Average lateness was 35.5 minutes. Sample window: Nov 5, 2025 to Nov 1, 2026.

These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.

When departures are on time

Best hour to depart: 23:00–23:59, 3.2% late.
Best day of week: Tuesday, 84.4% late.

Airlines with the most late departures

Airline	Flights sampled	Late	Average lateness
SriLankan (UL)	92	100.0%	44.9 min
PIA (PK)	52	100.0%	47.0 min
Uzbekistan Airways (HY)	22	100.0%	61.4 min
Alaska Airlines (AS)	79	98.7%	43.2 min
Japan Airlines (JL)	112	98.2%	34.0 min

Routes from LHR

LHR to JFK — 136 flights per week
LHR to DUB — 115 flights per week
LHR to AMS — 108 flights per week
LHR to FRA — 102 flights per week
LHR to MUC — 102 flights per week
LHR to CDG — 97 flights per week
LHR to GVA — 85 flights per week
LHR to ZRH — 83 flights per week

The departures that are late right now

86.1% of this LHR sample left 15 minutes late or more. GET /flight_delays returns the ones that are late at this moment: airline, flight number, scheduled time, actual time and minutes of delay.

https://www.goflightlabs.com/flight_delays?access_key=YOUR_ACCESS_KEY&delay=15&type=departures&dep_iata=LHR

Example response

Field names match the live API. This flight only shows the shape. It is not a live result.

{ "success": true, "data": [ { "airline_iata": "AA", "flight_iata": "AA100", "flight_number": "100", "dep_iata": "LHR", "dep_time": "2024-03-15 08:00", "dep_actual": "2024-03-15 08:22", "dep_delayed": 22, "status": "active" } ] }

That URL still says YOUR_ACCESS_KEY. A 7-day trial replaces it with a real key and returns the LHR departures that are late right now, in the JSON above. After the trial, Starter is $24.99/mo.

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